AVALIAÇÃO DO DESEMPENHO ENERGÉTICO DE FACHADAS: SIMULAÇÃO DE EDIFÍCIO COMERCIAL EM DIFERENTES ZONAS BIOCLIMÁTICAS BRASILEIRAS

Resumo

This study aimed to analyze the influence of façades on energy demand for air conditioning
of commercial buildings located in different Brazilian bioclimatic zones. In total 132 scenarios
were simulated using the software DesignBuilder, considering 4 façades types, 3 building sizes
and 11 cities, located in seven distinct bioclimatic zones, as parameters. Results highlighted
that the climatic conditions play an important role on air conditioning demand. Among the
façade types studied, the white painting had the best energetic performance, followed by
ventilated façades in aluminum composite material (ACM) and red granite and finally the
black painting. In each case, the heat gains were related to the material absorptance and
emissivity and to the air flux dynamics inside the ventilated cavities. Also, the increase of
building dimensions led to a reduction of energy demand per area, related to the increase of
air volume in the internal environment, and to a reduction of façade influence, due to the
increase of roofing influence and internal heat gains (equipment, lighting and human
metabolism).